Question 1

Which of the following statements best describes a bacteriophage?

Accepted Answer

A virus that infects only bacterial cells

Question 2

Thiomargarita namibiensis is notable in microbiology because:

Accepted Answer

It is the largest known bacterium, visible to the naked eye

Question 3

Which of the following is an example of an organic compound?

Accepted Answer

C\_6H\_12O\_6

Question 4

What is the primary difference between hydrophilic and hydrophobic molecules?

Accepted Answer

Hydrophilic molecules dissolve in water, while hydrophobic molecules do not

Question 5

Which element is most important in organic compounds and forms the backbone of macromolecules?

Accepted Answer

Carbon

Question 6

A triglyceride is composed of:

Accepted Answer

One glycerol molecule and three fatty acids

Question 7

Which part of a phospholipid is hydrophobic?

Accepted Answer

The fatty acid tails

Question 8

Which of the following is NOT a function of carbohydrates in cells?

Accepted Answer

Genetic information storage

Question 9

Which formula represents a general carbohydrate?

Accepted Answer

$$C_nH_{2n}O_n$$

Question 10

Which of the following is a disaccharide?

Accepted Answer

Sucrose

Question 11

Proteins are polymers made up of which monomers?

Accepted Answer

Amino acids

Question 12

Which bond forms between amino acids in a protein?

Accepted Answer

Peptide bond

Question 13

Which level of protein structure is primarily determined by interactions between R groups?

Accepted Answer

Tertiary structure

Question 14

Which of the following is NOT a component of a nucleotide?

Accepted Answer

Fatty acid

Question 15

In DNA, how many hydrogen bonds form between guanine and cytosine?

Accepted Answer

$$3$$

Question 16

Which statement best explains why GC-rich regions of DNA are more stable than AT-rich regions?

Accepted Answer

GC pairs form more hydrogen bonds than AT pairs

Question 17

Which macromolecule is primarily responsible for catalyzing chemical reactions in cells?

Accepted Answer

Proteins

Question 18

A patient is diagnosed with a genetic disorder affecting the structure of their cell membranes. Which macromolecule is most likely involved?

Accepted Answer

Phospholipids

Question 19

If a DNA molecule contains 20% adenine, what percentage of guanine does it contain?

Accepted Answer

$$30\%$$

Question 20

Which of the following best describes the role of nucleic acids in cells?

Accepted Answer

Storing and transmitting genetic information

Chemistry of Microbiology: Structure and Function of Biological Macromolecules

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